PURPOSE: To evaluate the feasibility of MRI for static and dynamic assessment of the deployment of thoracic aortic stent grafts after emergency implantation in trauma patients. METHODS: Twenty patients initially presenting with a rupture of the thoracic aorta were enrolled in this study. All patients underwent thoracic endovascular aortic repair (TEVAR). The deployment of the implanted stent graft was assessed by CTA and MRI, comprising the assessment of the aortic arch with and without contrast agent, and the assessment of the motion of the stent graft over the cardiac cycle. RESULTS: The stent graft geometry and motion over the cardiac cycle were assessable by MRI in all patients. Flow-mediated signal variations in areas of flow acceleration could be well visualised. No statistically significant differences in stent-graft diameters were observed between CT and MRI measurements. CONCLUSION: MRI appears to be a valuable tool for the assessment of thoracic stent grafts. It shows similar performance in the accurate assessment of stent-graft dimensions to the current gold standard CTA. Its capability of providing additional functional information and the lack of ionising radiation and nephrotoxic contrast agents may make MRI a valuable tool for monitoring patients after TEVAR.
PURPOSE: To evaluate the feasibility of MRI for static and dynamic assessment of the deployment of thoracic aortic stent grafts after emergency implantation in traumapatients. METHODS: Twenty patients initially presenting with a rupture of the thoracic aorta were enrolled in this study. All patients underwent thoracic endovascular aortic repair (TEVAR). The deployment of the implanted stent graft was assessed by CTA and MRI, comprising the assessment of the aortic arch with and without contrast agent, and the assessment of the motion of the stent graft over the cardiac cycle. RESULTS: The stent graft geometry and motion over the cardiac cycle were assessable by MRI in all patients. Flow-mediated signal variations in areas of flow acceleration could be well visualised. No statistically significant differences in stent-graft diameters were observed between CT and MRI measurements. CONCLUSION: MRI appears to be a valuable tool for the assessment of thoracic stent grafts. It shows similar performance in the accurate assessment of stent-graft dimensions to the current gold standard CTA. Its capability of providing additional functional information and the lack of ionising radiation and nephrotoxic contrast agents may make MRI a valuable tool for monitoring patients after TEVAR.
Authors: Sandra Pujadas; Gautham P Reddy; Oliver Weber; Christopher Tan; Philip Moore; Charles B Higgins Journal: J Magn Reson Imaging Date: 2006-07 Impact factor: 4.813
Authors: H Rousseau; C Dambrin; B Marcheix; L Richeux; M Mazerolles; C Cron; A Watkinson; A Mugniot; P Soula; V Chabbert; G Canevet; D Roux; P Massabuau; G Meites; T Tran Van; P Otal Journal: J Thorac Cardiovasc Surg Date: 2005-05 Impact factor: 5.209
Authors: Christopher J François; David Tuite; Vibhas Deshpande; Renate Jerecic; Peter Weale; James C Carr Journal: AJR Am J Roentgenol Date: 2008-04 Impact factor: 3.959
Authors: L Engellau; E M Larsson; U Albrechtsson; T Jonung; E Ribbe; J Thörne; Z Zdanowski; L Norgren Journal: Eur J Vasc Endovasc Surg Date: 1998-03 Impact factor: 7.069
Authors: Lars G Svensson; Nicholas T Kouchoukos; D Craig Miller; Joseph E Bavaria; Joseph S Coselli; Michael A Curi; Holger Eggebrecht; John A Elefteriades; Raimund Erbel; Thomas G Gleason; Bruce W Lytle; R Scott Mitchell; Christoph A Nienaber; Eric E Roselli; Hazim J Safi; Richard J Shemin; Gregorio A Sicard; Thoralf M Sundt; Wilson Y Szeto; Grayson H Wheatley Journal: Ann Thorac Surg Date: 2008-01 Impact factor: 4.330